"Obi-Wan Kenobi opened his eyes to find himself staring at what he strongly suspected was Anakin’s butt.
It looked like Anakin’s butt—well, his pants, anyway—though it was thoroughly impossible for Obi-Wan to be certain, since he had never before had occasion to examine Anakin’s butt upside down, which it currently appeared to be, nor from this rather uncomfortably close range.
And how he might have arrived at this angle and this range was entirely baffling.
He said, “Um, have I missed something?”
“Hang on,” he heard Anakin say. “We’re in a bit of a situation here.”
So it was Anakin’s butt after all. He supposed he might take a modicum of comfort from that.“
–Matthew Stover, Revenge of the Sith